一维量子点阵列自旋链上的信息传输  

Information transmission in spin chain of one-dimensional quantum dot array

作　　者：罗国忠[1] 

机构地区：[1]忻州师范学院物理系,山西忻州034000

出　　处：《量子电子学报》2015年第5期595-599,共5页Chinese Journal of Quantum Electronics

摘　　要：以基于紧束缚模型的实空间格点组成的一维线性均匀有序的量子点阵列为研究对象,利用演化算符的作用使其在量子点阵列的自旋链上进行单量子比特的信息传输。即使用演化算符exp(-iλt/hH)使单比特量子态从量子点阵列起始端为多粒子态|1_10_20_3…0_(N-1)0_N〉传输到末端态为|0_10_20_3…0_(N-1)1_N〉,在此基础上计算概率来讨论单量子比特能从起始端的多粒子态|1_10_20_3…0_(N-1)0_N〉的第一个量子比特完全传输到态|0_10_20_3…0_(N-1)1_N〉的末端第N个量子比特是可能的。The quantum dot array consisting of a uniform and orderly quantum dot based on one-dimensional linear real space lattice of tight-binding model was investigated, and the evolution operator was used to transfer a single qubit in a spin chain of quantum dot array. That is to say, the information of one-qubit is transferred to the terminal state from the multi-particle state ｜110203... ON-1ON〉 of initiating terminal of the quantum dot array ｜010203… 0N-11N） with the evolution operator exp（-iλt/hH） ,The probability was calculated. The results show that it is possible that the information of one-qubit is transferred from the first qubit of initiating terminal of the multi-particle state ｜010203…ON-10N） to the N qubit of the end of the terminal state ｜010203…0N-11N）

关 键 词：量子物理 信息传输 演化算符的泰勒展开 量子点阵列 线性自旋链 一维 单量子比特 

分 类 号：O488[理学—固体物理]